Pole and step therefor



LLGRUENFELD, JR.,.AND P; KIBCHER."

POLE AND THEREFOR. APPLICATION MAY 21, 1918.

Patented Feb 2 SHEET F/ar. 2.

1. 1.. GRUENFELD,'JR., AND P. KIREHER. POLE AND STEP THEREFOR.

APPLICATION FILED MAY 21. I9f8.

1,369,098. Patented Feb.22,1921.

2 SHEETSSHEE. 2.

Arrow 5m.

UNITED STATE-S1 PAT NT oFF-lcE,

JULIUS J. GRUENFELD, an, AND PAUL xrnonnn, or CHICAGO, rnrmoishssmnogs T MASSEY CONCRETE PORATION OE VIRGINIA.

To all whom c'fimay concern:

Be it known that we, Jumps J. GnunNrnLn, Jr., and PAUL KIRGH-ER, both citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements f in Poles and Steps Therefor,-(Case #1,) of

which the following is a specification.- v

This invention relates tojcliinbing devices for poles such, for example, as, concrete poles.

One of the pr mary objectsof our invention is the provision ofan improved climbing device of the character describedwhich can be used 'ordlnary spurs used in climbing wooden by linemen equipped with the poles. Anotherobject of the invention resides in the provision of a simple arrangement of concrete polej and step which canbe shipped with the steps in place without liability of injury or breakage Our invention also consists in so arranging the step with reference to. the pole that thersteps will not interfere with the use byllinemenof certain special climbingdevicesinthe nature of clamps which embrace anolgrip the pole In general, our invention contemplates a slmple and GHQOtlVQ form of replaceable step which 1s economical to manufacture" and capable of ready attachment or' removal and with reference to the pole as tobeprotectedfromtheefiects of which is so disposed theweather, and which is of; such anature as to afford little or -noassistance to -an-.{un-

authorized person seekingto climb the pole.

We accomplish the foregoingtogether with such other objects asmayshereinafter appear or are incident to: our inventionhy,

on the line III-III of Fig. 2; Figs; 4, and 5 are-end elevations of detailsof'our invention; F g 6 1s a partial .section through a mold adaptable for useiniforming theistep receiving portions of the side elevation of-Vthe mechanism sliown in Fig. 6; Fig. 8 is a sectiontaken on the 111116 VIII-VIII of Fig.

illustrating a modification of? the devices shown in Figs, 6, 7'and 8. v 1, p

' V Specification of Letters Patent.

as ap legsl l anda I wall; 19." p016 g7 is'a '7; Fig. 9 is a section" POLE Annsrnr THEREFOR. I h

Patented Fe 22, 19121.

' Application filed. May 1, 1918. Serial no. 235,802.

he Ourinvention is applicable for use in connect on-with hollow and'solid concrete poles, and is shown in the accompanying drawings venience of-illustration. o a h Referrmgnow to, the drawings, reference numeral 7 indicates the wall of the pole, there being formed in the outer face thereof,

step receiving recesses 8, The top and side edgewall's Stand 8?? of the recessed portions are curved and the bottom edge wall 8 is sloped as indicatedinFigs. 1', 2 and 3, for =a PRODUCTS'CORPORATION, or cnrcnoo, Immorsh contoahollowpole merely. for conalternatelyon opposite sidesQa plurality of purposewhich will hereinafter-appear, while i i aperturesr9 arefo'rined the wall offthe poleat each recessed portion 8 'thereo'f such apertures .being "located below the middle 7 cf such ;recessedfportions. The apertures;

n the preferred form :of our invention are square. Thesteps which we have indicated the bottonrwall 8 r of the recess is flat, for i reasons wh ch will hereinafter appear.)v The as. a whole by the reference letter A are adapted to be inserted in the apertures 9, Vi such steps comprising two members a and-'b so constructed and, arranged as to "constitute an expansion boltwhereby the steps mayfbe receive the spurs of the linemen. The head ,securely but releasably held inposition. The I outer member a of the steps comprises a head v a 10; which is adaptedto take against the bot tom face '8 of the recess, and a squareshank 11 which is adapted to. project into the aper- -ture9.'-, m 1' y a a c The head 10 is provided with a vertically 1 ,disposed slotoraperture 12 which is flared is' also provided with asocket ll adapted to 7 machine bolt being inserted by means'of the aperture 16. The shankiill iscomposedbf a top leg and two side legs (see Fig. 4;),the lower surface of the top leg being inclined tutes a spreader'which is composed of side i9 .is'tapped and threaded to receive the ma- ]receive the head ,of a machinebolt 15, such chinebolt,'such bolt havinga loose fit in the From the foregoing it will be apparent thatwhen the parts of the step are assembled andthe machine. screw tightened by the 1 tion being directed to-Figs. 6, 7, 8 and 9'. In

Figs. 6, '7 and 8 I have shown one form of apparatus for forming such recesses and apertures, such means comprising the mold form from which the poleis made; the

core block 21 which is adapted to form the recesses 8; and the plug 22 which is adapted to form the apertures 9. The core block 21 is preferably permanently attached to the form 20 by means of the screws 23 and'it is provided with an aperture 24' adapted to receive theplug 22, such aperture being arranged in alinement with a similar aperture 25 in the-wall of the form 20. The plug 22 is provided with a shoulder 26 adapted to limitthe inward movement of the plug, the exterior or head portion of the plug being provided with a small aperture 27 adapted to receive a cotter pin 28 whichis passed through an aperture in the ribs 29 formed on the' form 20. It is also provided with a second aperture 30 by means of which the plug may be removed.

The operation is as follows: The .core blocks 21 having been'secured to the wall of the mold form, the plugs 22 are then insorted to assume the position shown in Fig. 8 and they are then lockedin place by means of the cotter pin 28, such arrangement being particularly adaptable for use in following rotary processes in forming the hollow poles. In "the absence of some such locking means as the cotter pins, it will be apparent that the centrifugal force will cause the plugs 22 to fly out. After the pole has been formed either by the rotary method or any other preferred method, the plugs22 are removed, the arrangement being such that they strip outwithoutripping or injuring the fresh concrete. After the plugs are withdrawn the mold form is stripped from the concrete pole.

In the modification shown in Fig. 9, instead of forming the plugs '22 separately, they constitute permanently a part of the core blocks 21. i

The advantages of the improvement are as follows: The steps are-so located in the recesses 8 that their heads are substantially flushed with: the periphery of the pole, so that it is possible to ship'the poles with the steps in position without any liability of breakage. This arrangement also has the additional advantage that the steps will-prethe walls of the recesses.

may be readily replaced.

sent no interference to a lineman who is equipped with clamp climbers instead of with spurs. Furthermore the steps are protected from the effects of winter weather and are substantially non-freezing, and sleet will not collect in the recesses because of the rounded surfaces or walls, and because the spur receiving apertures 12 are to a certain extent hooded over or protected by It is also to be noted that while the arrangement is such that the spurs of the lineman can be readily inserted into the steps, nevertheless the apertures and the steps are of such a size and so disposed that it will be exceedingly diflicult for an unauthorized person to climb the 3 pole. Finally, itis to be noted that by forming the apertures 9 and the shank and spreader of a square shape, the steps will not turn butwill always be held in proper position to receive the spurs. In case of breakage it "will be apparentthat the steps We claim:

1. A device of the class described comprising a pole having a recess. in the face thereof and an opening in the bottom of said recess, .and a step comprising a portion adapted to engage said opening and a climbing head disposed in said recess, together with means for locking the step in the opening.

2. A device of the class described comprising a pole having a recess in the face thereof and an'opening inthe bottom of said recess, and a stepcomprising a portion adapted to engage said ing head disposed insaid recess, together with means for locking the step in the opening, said head being flushed with the surface of the pole. 1

3. A device of the class described comprising a pole, an opening in the pole, a step, a shank on the step extending into the opening, a wedge cooperating with the shank, and means for adjusting the wedge.

4. A device of. the class described comprising a pole, an opening in the pole, a step having a head adapted to receive a spur, a

shank on the step extending into the openopening and a climb- V the adjusting 5. A device of the class described comprising a pole, an opening inthe pole, a supporting member, a wedge adapted to co operate with the supporting member and the surface of'said opening, said member being shaped so as to prevent its rotation -1n the opening, and means for adjusting: the

wedge.

device of the class described comprising in combination a pole having an opening, and a step having a head and a shank, a wedge cotiperating with said shank and means for adjusting said wedge.

7. A device of the class described comprising a pole having a step receiving opening, a step having a head and a shank, said head being provided with a socket, a wedge cofiperating with said shank, and a screwfitting in said socket and having threaded engagement with said wedge whereby the 10 wedge may be adjusted. H g In testilngny whereof we have hereunto signed our names.

JULIUS J. GRUENFELD, JR. PAUL- KIRCHER. 

